Troubleshooting
Troubleshooting! Oddly, one of my favorite things to do. I know, I know…doesn't that imply that we did something wrong, or something isn't working as intended? Maybe, but we're going to dig in and learn what we missed or see what we need to adjust.
One thing I would recommend first is to read the Troubleshoot issues during onboarding documentation, as that provides a good basis for what could be wrong and where to start. You can find it at the following link: https://docs.microsoft.com/en-us/microsoft-365/security/defender-endpoint/troubleshoot-onboarding?view=o365-worldwide.
This article has a lot of good information in it to help with Windows event logs if you are having issues with the Group Policy deployment, providing a bunch of event IDs to look for and explaining what they mean, as well as a resolution to try out. The other nice chunk of information provided is a handful of error codes that you might see from a MEM deployment, including...